Possible diseased oak tree

Asked June 9, 2016, 3:49 PM EDT

Have a mature (white) oak that appears to be diseased. Is there anyone at the u of md extension who could assess the tree and recommend a plan of action. The damage seems to have started a couple of weeks ago. Thank you

Baltimore County Maryland

1 Response

Though we can't see the leaves too distinctly, this is probably oak anthracnose, a fungal disease. It is common in many species of shade trees when we have a prolonged period of wet, overcast days--as we did recently. (Actually, the sycamores got hit much harder than the oaks.) Mature native trees can weather this disease without last effects because they have co-evolved with the disease and are able to adapt to it.

Here is information what to do about anthracnose from our website:http://extension.umd.edu/hgic/shade-tree-anthracnose-trees
This should not occur every year, but only when weather conditions are just right.